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2 Sheets-Sheet 1.

(No Model.)

- W. FABIAN 8a A. TELLER.

KNIFE CLEANING APPARATUS.

No. 314,658. Patented Mar. 31, 1885.

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(No Model.) Sheets-Sheet 2.

W. FABIAN & A. TELLER KNIFE CLEANING APPARATUS.

Patented Mar. 31, 1885.

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WILHELM FABIAN AND ADALBERT TELLER, OF HAMBURG, GERMANY.

KNlFE-OLEANING APPARATUS.

F PECIPICATIQN forming part of Letters Patent No. 314,658, dated March 31, 1885.

Application filed July 12, 1884. (No model.)

T0 whom it may concern Be it known that we, WVILHELM FABIAN and ADALBERT TELLER, both subjects of the Em peror of Germany, and residents of Hamburg, in said Empire, have invented a new and use 7 ful Improvement in Knife-Cleaning Machines,

of which the following is a specification, reference being had to the accompanying drawlugs.

This machine, embodying our invention, c011- sists in its essential parts of two rollers or disks of peculiar shape, of soft vulcanized india-rubber, which are pressed together at their peripherical surfaces and rotated against each other, while the knife to be cleaned is passed between them in a manner that will be hereinafter described. The india-rubber rollers or disks are constructed in such manner that they easily flatten off while pressed together, and bear upon the knife across its full width, in consequence of which the polishing of its full surface is completed by passing it once between the rollers or disks.

Figure 1 in the drawings is a rear elevation of the machine. Fig. 2 is a plan of the same, with the upper portion of the casing which contains the rollers or disks removed. Fig. 3 exhibits a vertical section in the line a b of Fig. 2. Fig. 4. represents a vertical section in the line a (Z of Fig. 2, showing the rollers or disks with the pressure removed. Fig. 5 rep resents a section like Fig. 4., except that the rollers or disks have the pressure applied. Fig. 6 represents a vertical section in the line cf. Fig. 7 is a front view of one of the rollers or disks alone and without side plates, between which the elastic material is secured, such plates being omitted; and Fig. 8 is an axial section of the same.

Similar letters of reference indicate corresponding parts in the several figures.

The two india-rubber disks or rollers P and S, each of which is formed, essentially, in accordance with disk P, (shown in Figs. 7 and 8,) have their shafts a a supported in bearings of the machine'stand, in which they can slide in a horizontal direction within certain limits, while by a handle, k, intermediate shaft, b, and gearing m a they can be rotated against each other. A knife, M, placed between the disks or rollers, will consequently be touched by them at both sides as soon as the disks or rollers are brought close together. By turning an eccentric, 0, out of its position of Fig. 4 into that shown in Fig. 5, the disks or rollers can be pressed together. The arms cl and d, that engage behind shafts a and a, are in that case brought nearer together, as will be understood with reference to the drawings. The arm d, which holds the shaft a, projects rigidly upward from one end of a horizontal bar, (P, which is free to slide on the bed of the machine, and is guided in a loop or strap, (2*. To the opposite end of the bar d is pivoted the eccentric or cam e. The arm (2 is pivoted at to a support, (1 and by moving the cam-lever e in one direction it draws or moves the arms d d toward each other, and brings the peripheries of the rollers or disks together. This movement is so slight that it does not interfere with the outer bearings, (1*, of the shafts a a, said bearings being very short, nor with the proper engagement of the wheels at n, which drive said shaft. The construction of disks or rollers P and S, each with one or more concave groove or grooves, 7L2, at its outer circumference, and concentric grooves h and h at the sides, near the outer edge, as shown in Fig.8, allows the material to be flattened off to a broad plane, while the disks are pressed together without giving much resistance to the transmission of rotation, and without distorting the material in any damaging manner. At the line ofeontact the peripheries of the two disks or rollers are flattened off so as to form a tangent plane of about the width of the knife, similar to that shown in Figs. 2, 5, and 6 of the drawings, while the material from the circumference of the disks is displaced toward the grooves h h.

To prevent the edges of the rollers or disks from being pressed too far outward by the knife while this is shifted sidewise, side plates, 9 and g, are applied, that nearly cover the sides of the disks. The knife bears with the back on rollers o 1) or on a smooth plane or projection of the stand. The disks or rollers are covered at the circumference by strips of leather, Z, and polishingpowder or other polishing material is applied, which may be applied by hand or fall between the disks or rollers from a hopper above them; or the disks or rollers may partly revolve within small or disks having grooves h in their circumferences and grooves h h in their sides, of the side plates, g 9, covering the said grooves h h in r 5 their sides, substantially as described, and as illustrated in the accompanying sheet of drawlngs. I

WILHELM FABIAN. ADALBERT TELLER.

. troughs t t of the casing, furnished with polishing material, strips of leather or metal, 2 z, geing applied to strip off all superfluous power. 5 What we claim as our invention, and desire to secure by Letters Patent, is-

1. The combination, in a knife-cleaning machine, of two revolving rollers or disks of elastic material having grooves in their circum- 10 ferences and sides, substantially as and for the Witnesses:

purpose herein described. F. ENGEL, 2. The combination, with the elastic rollers F. OLAIRMONT. 

